The back is on fire?

Is there still such an operation in these years?

Xu Mang was stunned when he heard it, he felt that the person in front of him was fooling himself, and his back could be on fire... Do you think everyone is called Beckham, is it the 'Beckham' in the world's football?

"Who are you?" Xu Mang said angrily: "Are you a fool for me? How can the back be on fire? Without the embellishment of my beautiful face, this is not in... Is it funny?"

Country 1: ???

Ha?

This... This and the impression of Professor Xu in the photo... It feels a little different.

The real one seems to be quite ... So what.

It's a bit of a bad word.

"Professor Xu?"

"You... I forgot to introduce me, I'm a single country one... I met Professor Hua Yanfeng. Shan Guoyi said seriously: "Don't look at my age than you, but I am far inferior to you in academics." ”

"Oh..."

"Old Dan!" Xu Mang has a very good impression of this comrade Shan Guoyi, first of all, he is more modest, much better than those Europeans and Americans, and said with a smile: "What is the situation? What is the back?"

"It's... Allow me to sell a pass, and I'll find out later. Shan Guoyi smiled, and after a while, he said solemnly: "Professor Xu... What stage are you at in terms of prophecy particles, axions?"

Xu Mang thought for a moment and said indifferently: "Theoretical stage." ”

Although no progress has been made, the unfathomable appearance has to be pretended, but... Shan Guoyi is an old fritter in the rivers and lakes, and he instantly knows that Xu Mang has not achieved any results at present.

"Forty-two years of prophecy, that would have been so easy to do. Shan Guoyi said seriously: "Professor Xu, take your time, with your attitude towards scientific research, I believe that miracles will happen in the near future." ”

Xu Mang's face was full of confusion, watching this comrade of Shan Guoyi leave.

No way?

What's the situation?

Don't... Shengshi beauty not only burns single women, but also oily middle-aged men by the way?

"What's going on?"

"I don't understand it at all..."

Long

When Xu Mang returned to the apartment, he found that Xiao Man had already arrived, and there was no way... It's been too long to be delayed at the institute.

"Huh?"

"Xiao Man, classmate is so diligent today?" Xu Mang knew that he was coming back late, so he hurriedly prepared the witticism he had thought of before, and came to the kitchen with a hint of a bad smile, he knew that as long as he gently hugged Xiao Man from behind and said a few words in her ear, she would instantly go limp.

When the time comes...

It's not a happy look.

Sure enough,

When Xu Mang completed this set of actions, Xiao Man surrendered instantly, and he was not angry... An action and a few witty words, and the confusion was taken down by this big idiot.

"Humph!"

"Anyway... I have a question that I hope you can answer in person. Yang Xiaoman's crimson face squeaked and said: "This question is what I saw on the Internet, if I fall into the water with my mother-in-law at the same time, who will you save?"

"I can't swim!" Yang Xiaoman didn't come out with a fatal condition.

Xu Mang: Embarrassed

Send a proposition!

This is definitely a proposition!

It stands to reason that... If the daughter-in-law asks this question, then the daughter-in-law must be saved, if the mother asks this question, then the mother is definitely saved, if the two ask this question at the same time, basically this situation will not occur.

But...

There is a bug in Xiaoman's rhetoric, which is a language loophole.

"Save my mother!" Xu Mang said categorically.

Words fall,

Yang Xiaoman was so angry that he exploded, but he couldn't attack, he was silent and his face was slightly dark.

"Your colleague fell into the water, what does it have to do with me?" Xu Mang said angrily: "In the future, I will watch less Douyin, I see that your brain is stupid." ”

Same...

Colleague?

Yang Xiaoman recalled what he had just said, and he and his mother-in-law at the same time...

Meantime?

Colleague?

Xiao Man pinched Xu Mang's face and said helplessly: "Okay... I know it's wrong, can you stop putting on your stinky face, quick... Laugh!"

In the blink of an eye,

Xu Mang went from passive to active.

After dinner,

Xu Mang sat in front of his computer, began to think about how to solve the current problem, today is also ashamed, I was going to look for inspiration, but I found it and slept for a day, fortunately, the environment at that time gave a lot of skill points, otherwise this day would be miserable.

Saying...

What is that inspiration for you?

It seems like...

Xu Mang gradually recalled the previous fragments, and he felt that he was getting closer and closer to the truth.

Fermion!

Right...

That's it!

Xu Mang finally remembered what the previous flash point was, a particle called fermion, in a group of identical particles, if only one particle is allowed to be accommodated in a quantum state of the system, this is called fermion.

Of course

Xu Mang was looking for another artifact.

Weyl fermions!

A quality-free fermion.

Xu Mang thinks... There is an inevitable connection between Weylic fermions and axions.

However, he was faced with an even greater challenge, and it was not easier to find Weyl fermions than axons, which in 1929 described a pair of overlapping new particles with opposite chirality based on a mass of zero.

This particle is called Weyl fermions, alas... More than 80 years have passed, and humans have not been able to observe Weyl fermions in experiments.

It looks like this,

Weyl fermions are more difficult than axles, but in fact they are not.

This particle can be solved according to the Dirac equation, which has a very complete formula.

Pity...

To detect Weyl fermions, we need to first find Weyl semimetals.

"it!"

"Is there an end? I'm just like finding a shaft, why are there so many things all at once?" Xu Mang's head was about to explode, a forty-two year prediction of the shaft, derived from Weyl fermions more than eighty years ago, and a Weyl semi-metal.

Then

Yang Xiaoman was sitting on the sofa, eating snacks and watching TV shows, when he suddenly heard Xu Mang's complaint, turned his head and saw this big idiot holding his head, his face full of pain, and he was speechless for a while.

Oh, my God!

This guy isn't going to drive himself crazy, is he?

"Huh?"

"Stop scratching your hair... Hair is innocent. Yang Xiaoman put down the potato chips, walked behind Xu Mang, rubbed his cheeks, and said gently: "Don't worry... Take your time, it will be solved one day. ”

"Oh," Xu Mang thought of a solution.

Weyl semi-metallic materials...

When two spin nondegenerate bands are required to cross linearly near the Fermi level, the excited state of the low-energy quasiparticle behaves in the same way as Weyl fermions, but... This also brings a completely new problem, if the Weyl fermion state exists, many new physical phenomena will inevitably appear in Weyl semimetals.

Well...

Let's start from this aspect and construct the physical phenomenon of Weyl semimetals step by step.

Thinking of this,

Xu Mang slapped Xiao Man's mischievous hand away, took out his mobile phone and made a call to Fan Zhilong.

"Hello?"

"Professor Fan!"

"I need your help, tomorrow at nine o'clock in the morning... See you in the Condensed Matter Physics Laboratory. ”

Without giving Fan Zhilong any chance to speak, Xu Mang hung up the phone directly, and then began to think about the physical properties of Weyl semimetals, and made reasonable speculations according to the theoretical prediction - Weyl fermion state.

At this moment,

Yang Xiaoman was a little embarrassed, she felt that she was redundant in this family, Xu Mang's eldest wife was called physics, the second wife was called mathematics, the third wife was a Porsche, the fourth or fifth wife was two motorcycles, and the last sixth wife was herself.

Wrong!

If his birthday gift custom version of Fengshen is super broken, wouldn't he become the seventh wife?

"Humph!"

"Xu Shimei!"

Yang Xiaoman twisted Xu Mang's ears angrily, and said angrily: "There was Chen Shimei in the past, and there is Xu Shimei now, you are a scumbag!"

Xu Mang: ???

Alas?

What just happened?

How did you suddenly become a scumbag?

Leave her alone!

According to the prophecy theory of Weyl fermion states, the following points can be basically determined: first, there are Weyl cones that appear in pairs in the body energy band structure with opposite chirality, and secondly, there is an open Fermi surface that connects the surface projections of two Weyl points on the crystal surface.

This kind of Fermi noodles is called Fermi arc...

Thirdly, the separation of different chiral Weyl fermions from each other can lead to peculiar chiral anomalies.

basically

If nothing else,

These three cases are presumably the 'strange' physical phenomena of Weyl semimetals.

Weyl cone,

Fermi arc,

Chiral abnormality...

Based on these three characteristics, let's find the corresponding material.

Half past nine in the evening,

Xu Mang has figured out the basic theoretical framework of Weyl semimetals, which is actually some derivation results from Weyl fermion states.

After taking a shower,

After putting on his pants, Xu Mang was about to sleep, but found that the bedroom door was locked, and hurriedly knocked on the door.

"Xiao Man?"

"Open the door!" Xu Mang shouted.

"Do you know it's wrong?" Yang Xiaoman said angrily.

"Huh?"

"Oh... I was wrong. Xu Mang remembered his cousin-in-law's words at this time, and in the face of his daughter-in-law, just admit his mistake unconditionally.

Alas...

It's time to count the time and come to relatives.

moment

The door opened,

Xu Mang slipped in, and before Xiao Man could react, he got directly into the quilt.

It's safe!

"Xiao Man?"

"Huh?"

"Why are you suddenly angry?" Xu Mang asked curiously, "Is it a relative?"

Yang Xiaoman glanced at him and said glutinously: "Why are you so careful?

Hearing these words, Xu Mang suddenly felt a little bad,

Finished!

It's all over!

Xiucai met Bing, and he couldn't explain it clearly.

This night,

Spent in blood and tears and sweat.

...

Following

Xu Mang carried his satchel and walked slowly to the condensed matter physics laboratory.

"Huh?"

"Professor Fan is so early?" Xu Mang put down his satchel with a smile, drank soy milk and asked, "Have you had breakfast?"

"Eat. ”

"What are you looking for me?" asked Fan Zhilong.

"Give!"

Xu Mang threw out a promised manuscript from his satchel and said with a smile: "The content is all on it." ”

Fan Zhilong was stunned for a moment, picked up the manuscript and opened it, in less than half a minute, his heartbeat began to accelerate, his breathing became rapid, the thoughts in his brain had been drained, and now Fan Zhilong was only left with a shriveled body.

"This..."

"You..."

Fan Zhilong raised his head and looked at Xu Mang in horror: "Weyl semi-metal?"

......